Listing CPU details

If you want to know the details of the processor in your system, there are two ways to the information.

First is by looking into /proc/cpuinfo, this gives a lot of details, including the vendor name, the frequency,L2 or l3 cache size etc.
For eg:

$ cat /proc/cpuoinfo 
processor    : 0
vendor_id    : AuthenticAMD
cpu family    : 15
model        : 12
model name    : AMD Athlon(tm) XP Processor 3000+
stepping    : 0
cpu MHz        : 800.000
cache size    : 256 KB
fdiv_bug    : no
hlt_bug        : no
f00f_bug    : no
coma_bug    : no
fpu        : yes
fpu_exception    : yes
cpuid level    : 1
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx mmxext 3dnowext 3dnow up
bogomips    : 1595.97
clflush size    : 64
cache_alignment    : 64
address sizes    : 40 bits physical, 32 bits virtual
power management: ts fid vid ttp

Another way is by running the command "lscpu". This gives lesser information than the proc entry above but has some information not available in the output of cpuinfo, like the architecture, the L1 cache details etc.

For eg:

$ lscpu
Architecture:          i686
CPU(s):                1
Thread(s) per core:    1
Core(s) per socket:    1
CPU socket(s):         1
Vendor ID:             AuthenticAMD
CPU family:            15
Model:                 12
Stepping:              0
CPU MHz:               800.000
L1d cache:             64K
L1i cache:             64K
L2 cache:              256K